Machine for riveting sheet-metal pipe



(No Model.) 2 shet s sheet 1.

J. B. ROOT.

, MACHINE FOR RIVETING SHEET METAL PIPE. No. 292,364,

'Patnted Jan.'22; 1884-.

ETERS. Phmuhlhcgmphcr, wauingrm B4 c.

(NoMo'deL) 2 Sheets-Sheet 2,

J. B. ROOT.

MACHINE FOR RIVETING SHEET METAL PIPE. v No. 292,364. Patented Jan 22. 1884.

1 .UNIT ST ATES PATENT-j OFFICE.

JOHN B. ROOT, OF PORT CHESTER, NEYV YQRK.

M ACHlNE FOR RIVETIING SH EET-METAL PIPE.

SPECIFICATION forming part of Letters Patent No. 292,364, dated Januaiy 22, 1584.

' Application filed September 10, 1883. (No model.)

To all whom it may concern:

Be it known that I, JoHNB. R001, of Port Chester, in the county of Westches'ter and State of New .York, have invented certain new and useful Improvements in Machines for Riveting Sheet-Metal 'Pipe; and I hereby declare the same in the following full, clear, and exact description thereof.

The improved features relate to machines for riveting punched sheet-metal blanks, particularly those designed for pipe-sections and various other tubular articles, the machine herein described being especially adapted to riveting the blanks from which house or range boil 'position to which they are conveyed by theserted in the blank, andthenheaded down;

and, further, in a spring or other yielding catch arranged to retain the rivets in the forward carrier, and in a reciprocating plunger arranged so as to force the rivets up through theblank from such forward position or into the holes punched therein. A

In the accompanying drawings, Figure l is a side elevation of the machine,with the mandrel in central section. Fig. 2 is a top or plan view of the machine. Fig. 3 is an end view of the mandrel. Fig. 4 is an elevation of a modified smallermachine; and Figs. 5, 6, 7, 8, and 9 are enlarged detail views of the rivetretaining catch, rivet'carrier, and rivet-tube.

In these ,views, the letter A represents the bed of the machine, and B a standard rising therefrom, which supports the mandrel O and associated riveting mechanism.

D is a rivet-carrier which lies in a groove running along the 'top of the mandrel. provided with a rack, E, which engages with a gear F, and is of sufficient length so that by the revolution of this gear the forward forked end, G, of the carrier, Fig. 8, is reciprocated from a point behind the rivet-tube H to the head of the mandrel or anvil I. The gear F is provided with a pinion, J, which engages with a rack, K, connected by pitman L to the treadle M, the operation of which, it will 'be'seen, advances the rivet-carrier, the weight of the parts being sufficient to return it. In thus advancing, the forked end of the carrier engages the shankof a'rivet which has fallen from the rivet-tube into the carrier-groove, as

seen in Fig. 9, and conveys it to the riveting I end of the mandrel, the lower end of the rivettube being closed by the carrier, and the rivets thereby prevented from escaping until the carrier is returned. 7 As a rivet reaches the anvil I it passes by a catch, N, which is made yield- .ing by spring 0 to the advance of the rivet, and is shaped to engage the head of, and thereby retain, the rivet when the carrier recedes.

-l? is aplunger, which is reciprocated bylle ver Q, supported in a groove in theunder side of the'mandrel, and connected with the operating-treadle R by pitman S, and the location and arrangement of this plunger are such that the rivet-carrier leaves the rivets resting upon the end thereof, as seen in Fig. 5. It will now' be plain that, upon bringing one of the holes of a pipe or other blank over the position of the rivet anddepressing the treadle R, the rivet upon the end of the plunger will be forced into the blank, as seen in Fig. 6. The blank is then shifted slightly to one side and the rivet headed-down either by hand or suitable aux iliary heading mechanism, and in thus shifting the blank another hole maybe brought into position to receive a rivet, as shown in Fig. 6. The right adjustment of the blank, when shifting it to head a rivet, so as to also bringau unfilled hole accurately over the rivet-inserting plunger, is conveniently effected by bringing the head of the rivet last inserted into'a shallow indent, T, for longitudinal seams, or into an indent, U, for circular seams, these indents being loca'ted the same distance fromv the axis of the plunger as is that between the corresponding punched holes of the blank.

In Fig. 4 I show a modified form of this machine as adapted for riveting smaller blanks.

than the machine of the first two figures. Here, 4

their connections on by an added weight, as

shown, upon the rivet-inserting treadle, so that the backward movement of the parts may be effected automatically. These treadles may,

however, be dispensed with and the opera-.

tion made wholly automatic by suitable connections with some source of power.

It is plain that other means for connecting the rivetcarrier with the operating-wheel than by a rack and gearing may be employed, and I do not, accordingly, confine myself to the precise construction shown. So, also, though I have spoken of the blank as being punched, it is manifest that this is not essential, for the rivet-inserting plunger may be employed to force the rivets through an unpunched blank; and this plunger, too, may be employed in lieu of an anvil, and the rivets be headed upon it, it being arranged to withstand the heading mechanism.

\Vhat is claimed as new is 1. In a pipe riveting machine, the combination of a riveting-mandrel with a sliding rivet-carrier contained therein, and adapted to reciprocate from one end thereof to the other or riveting end, for the purpose 'set forth.

2. In a pipe-rh'eting machine, the combination of a riveting-mandrel with a sliding rivet-carrying rack contained therein, and gearing for reciprocating such rack, as and for the purpose set forth.

3. In a pipe-riveting machine, the combination of a riveting-mandrel, a longitudinallymoving rivet-carrier contained therein, and a yielding catch arranged to retain the rivets as the carrier returns from its forward movement, for the purpose set forth.

4. -In a pipe-riveting machine, the combination of a riveting-mandrel, a rivet-carrier arranged to convey the rivets to the riveting end of the mandrel, and a reciprocating plunger arranged to insert the rivets in the blank, as set forth.

5. The combination, in a pipe-riveting machine, of a riveting-mandrel, a rivet-feeding device located without the position of the blank operated upon, and a rivet-carrier reciprocatwill 

